GENERAL:
I have written an article for AdultBuzz Magazine on marketing to the adult bisexual audience. The article is not exactly a masterpiece of literature :o) , but I think some of you may find it useful:
click here to read it

TRAFFIC:
The following adult linklists are either exclusively for bisexual sites or have bisexual categories:

A Hooker's Pornlist
HunkHunter's
Mondo Erotica

The following resource sites list "mainstream" (non-adult) bisexual sites:
Bisexual.com
www.bi.org
Bisexual Resource Center
Bi Planet
Bi The Way